Copyrights are for the rights of authors such as music, books and movies. Patents are for inventions and Trademarks are for brand names.
Copyright laws prohibit copying protected works from being copied or distributed to the public. Generally, you cannot copy and sell things like music, books and movies. Many lawsuits have been filed when music is shared with the general public. To get permission to use a protected work a royalty is often paid such as when music is used in a business or advertising.